Locking device



Aug. 1, 1933. 1.. P. PATTERSON 1,920,521

LOCKING DEVICE Filed No 5, 1952 ATTORNEYS.

I 50 the same attached to a screen window Patented Aug. 1, 1933 UNITED srArEs LOOKING DEVICE Lewis" Preston Patterson, Calif.

West Los Angeles,

Application November 5,1932. swarm. 641,390

3 Claims.

This invention relates'to a hook lock for. use in connection with any kind of a closure'element which is to be fastened in its closed position by means of a hook and eye bolt or'like member '5 with which the hookicooperates.

Ordinarily the invention will-be used to lock the hooks of screen doors andwindow screens in their latched position. When so used the device will prevent unauthorized persons from opening door screens and window screens from the outside by inserting a slender instrument of any kind through the mesh of the screen and thereby unlatching the hook.

It also makes it impossible for an unauthorized person, after cutting a hole in the screen, to insert his hand and unlatch the hook as he can easily do with the latching devices in general use in connection with screen doors and screen windows, owing to the fact that no key is re- 2O quired to operate these devices.

Another object of the invention is to provide a detachable, simple, inexpensive and efiicient locking device that will not bend-or scar the point of the hook and that can be taken from one dwelling to another by the person possessing the same.

- Permanent installation of safety devices for screen doors and screen windows wouldbe more expensive than property owners would ordinarily care to provide for tenants. By this invention the tenant may own his own safety device and transfer it to the next residence when he changes his 4o ing the same in its operative positionwith relation to a hook and eye bolt but the locking element in the open position.

Fig. 2 is a view similar to Fig. 1 except that the locking element is shown in its partly closed or retracted position. Fig. 6 indicates the plane of section for Figs. 1 and 2.

Fig. 3 is a partsection on line 3 -3 of Fig. 2. Fig. 4 is a side elevation of the device showing parts of which are shown in section. I

Fig. 5 is a side elevation of a modified form of the device wherein the jaw of the device is provided with a hook portion thus producing a padlock construction.

The section line 2--2 of 1 Fig. 6 is a plan view of Fig. 2 with parts broken away. I 7

Fig. '7 is a side elevation of the device partly in section showing a diiferent design for the socket portion thereof.

Referring in detail to the drawing, the casing 5 is'made up of the side plates 6 preferably of identical constructionwhich are provided with flange portions directed toward each other to enclose the required amount of space when said plates are held together by means of the pins 8 and 9. At onecorner portion of the casing these plates are so shaped as to provide a socket portion 10 which is adapted to receive the point portion 11 of the hook 12, after said hook 12 has been. brought into engagement with the eye bolt 13 to latch a window or door in the closed position. The socket portion 10 includes the sleeve 10a held in place by upset ends 1012.

With the socket portion 10 of the device cooperates a jaw member 15 which is pivotally mounted upon the pin 7 and which is provided at one side of its pivot with a recessed portion 16 which is adapted to fit over the bent portion of the hook 12 when the jaw is in its closed position. At the other side of its pivot, said jaw is provided with a pawl portion 17 with which cooperates the elbow member 18, said member 18 being pivotally mounted upon the pin 8. One arm of said elbow member is provided with a series of ratchet teeth 19, these ratchet teeth cooperating with the pawl 17 to maintain the jaw in a more or less closed position after the same has been manually moved toward the socket portion 10 to the desired extent. A bent leaf spring 20 is provided, one end of said spring engaging the pawl portion of the jaw 15 to yieldingly hold the jaw in its open position, and the other end of said spring engaging the back side of the ratchet arm of the elbow member and thereby tending to move the ratchet teeth thereof into engagement with the pawl portion 1'7.

The elbow member 18 is provided with an operating arm 21 which is positioned to be engaged by the key blade 22 when the key is inserted and turned in the manner necessary to release the ratchet teeth of the elbow member from the pawl ,17 thus permitting the spring 20 to open the jaw 15. In the lower portion of the lock casing is Shown a registering member 25 which may be of any desired well known form to prevent the use of any kind of key not designed for the purpose of opening the look. 24 is a rotary barrel for the key.

In Fig. 4 the lock is shown applied to a screen 2110 window in a situation in which the point of the hook is directed horizontally instead of vertically. In this view the lock casing 5 isshown swung over toward the hook 12 in such a manner that it does not interfere with the complete closing of the window sash 31 with relation to the window sill 30. The hook 12is here shown attachedto the frame portion 32 of a window screen.

, In Fig. 5 is shown a modification of the device wherein a hooked-jaw 15x having a point portion 152 which is adapted to enter the socket portion 10 of the casing, is substituted for the jaw member 15 already described. This form of the device is suited for use as a substitute for the ordinary padlock.

In Fig. 7 the socket portion of the casing is shown extended at 35 in order more effectually to safeguard against the eye bolt 13 dropping down to a position wherein it might be possible for the hook to be released even when the locking jaw is in the closed position. In this view the cooperation of the concave jaw recess 16 with the convex side of the hook is more clearly brought out.

, I claim:

1. In a locking device, acasing having a socket adapted to receive the point portion of a hook while it extends through an eye bolt, a jaw mounted upon said casing having a recessed portion to overlie said hook to prevent its Withdrawal from said socket portion when the jaw is in a closed position, and means to lock said jaw in a closed position.

2. In a locking device, a casing, a jaw pivotally mounted uponsaid casing, said casing having an extension with which said jaw cooperates in per forming its locking function, said jaw being provided within said casing with an extension which forms a pawl, an elbow member pivotally mounted within said casing, said elbow member having one of its arms provided with a plurality of steps whichcooperate with said pawl to lock the jaw in a more or less closed position, a spring which is operatively related both to said pawl and to said elbow member to hold said jaw against an unlocking movement, and means to move said elbow member against the opposition of said spring to unlock-said jaw.

3. In a locking device, a casing having a socket portion adapted to receive the point of a hook while said hook is engaged'with an eye bolt, a jaw mounted upon said casing to move toward and from said socket portion, said jaw having a recessed portion adapted to receive the convex side of the bend of said hook, said jaw having also a pawl portion, and a ratchet member to cooperate with said pawl portion to lock said jaw in a more or less closed position with relation to the socket portion of the casing.

LEWIS PRESTON PATTERSON. 

